Examining incentives and preferential treatment of carpools on managed lane facilities

Document Type

Journal Article

Publication Date


Subject Area

infrastructure - bus/tram lane, mode - carpool


As managed lanes (ML) are considered throughout more than 25 North America cities, there is a need for guidance in defining the role of carpools in tolled ML and the trade-offs between carpool exemptions and other project objectives. Increasingly, project objectives are reflecting not only mobility concerns but the need to generate revenue as well. As a result, allowing exempt or discounted users, such as carpools on priced-ML requires an evaluation of revenue impacts as well as mobility interests such as person movements, operations, and emissions.

This article highlights the existing body of knowledge regarding carpooling, facilities, and incentives designed to encourage carpooling and carpooling’s contributions to society. Following a review of literature, state and regional entities involved in either operating existing ML facilities or planning for new facilities were interviewed to determine the rationale for setting their carpool policies.


Permission to publish the abstract given by the Journal of Public Transportation.